Cardboard cutting and grooving device.



No. 64l,79l. Patent-5d Jan. 23, 1900.

NICOLAI. CARDBOARD CUTTING AND GROOVING DEV-ICE.

' (Application filedlug. 30, 1894.) (No Model.) 2 Sheets-Sheet l.

N0. 64|,79|. Patented Jan; 23, I900.

L. N'IC-U'LAI. CARDBOARD CUTTING AND GRUUVING DEVlCE.

(Application med gu so, 1694. 4 (No Mode l.) 2 Sheets-Sheet 2,

NIT-E TATES LUDVVIG NICOLAI, OF DRESDEN, GERMANY.

CARDBOARD CUTTING AND GROOVING DEVICE.

SPECIFICATION forming part of Letters Patent No. 641,791, dated January23, 1900.

Application filed August 80, 1894. Serial No. 521,718. (No model.)

To all whom it nuty concern.-

Be it known that I, LUDWIG NICOLAI, a subject of the King of Saxony,residing in the city of Dresden, Germany, have invented certainImprovements in Apparatus for Cutting, Slit ting, and Grooving Cardboardand other Materials, of which the following is a specification.

The object of my invention is to provide a tool for cutting, slitting,or grooving cardboard or other material, the cutter of the tool beingmade of a thin narrow strip of sheetsteel of any desired length.

One of the advantages of this cutter is that it is at all times keptsharp, as by the operation of the tool the cutter is automaticallysharpened and has only to be adjusted from time to time to compensatefor the wearing away of the cutting edge. The thin resilient and elasticsteel strip may be used in various ways,as illustrated in theaccompanying d rawings, in which-- Figure 1 illustrates the tool formachine use, the cutting-blade being secured to a holder or clamp adjustably held on a crossbar of the machine-frame, and also shows rollsfor feeding the material being acted upon to the knife. Fig. 2 is asectional elevation of a similar machine, in which two cuttingblades aresecured in a holder in such manner that the cutting ends form an angleand the edges thereof are brought closely together for the purpose ofcutting a V-shaped or angular groove in the material. Fig. 3 is anelevation of a portion of machine shown in Fig. 2, illustrating moreclearly the construction of clamp for holding the knife in position.Figs. 4 and 5 are views similar to Figs. 2 and 3, showing the employmentof two outting-blades arranged parallel to each other for their entirelength for the purpose of cutting a right-angled groove or channel inthe cardboard, leather, or other material. Fig. 6 illustrates a slightmodification of the machine shown in Fig. 4, an additional adjustableblade being employed for the purpose of removing the material betweenthe cutting edges of the two blades.

In the drawings, a designates the cuttingblade, formed of a thin narrowstrip of elastic steel of the same thickness throughout its entirelength and clamped near one end,which forms the cutting edge, betweentwo clamping-cheeks o in the manner hereinafter described. The cuttingedge is formed on the lower end of the thin steel strip, and the lattermay be adjusted or reset between the clamping-cheeks whenever it becomesnecessary through wear or abrading of the cutting edge until only ashort piece of the steel strip remains. The application of acutting-blade of this character to a machine is illustrated in Fig. 1,in which e represents one of the crossbars of the frame of the machine,and f a feed-roller mounted in the frame and acting in connection with aroller 01 to feed the pasteboard, leather, or other material to thecutting-knife. This roller'nis preferably mounted in bearings on' abracket 70, secured by a screw h to a block 9, adj ustablein ahorizontal line in dovetailed guideways provided on the side of thecross-bar e, and the vertical position of the roller n being determinedby an adj usting-screw 1', having handles or wings Z, by which it may beturned to adjust the distance between the peripheries of the rollersthickness. The cutting blade a is confined near its cutting edge betweentwo clampingcheeks 0, secured together by a screw p, the cheeks beingcarried by a bracket adj ustably secured to a block 9 by a screw it, thevertical position of the bracket being determined by an adj usting-screw7 having wings 1'. With a machine of this character the cardboard,leather, or other material to be acted upon may be fed between thefeeding-rollers and by them carried under the knife, which will act toout or indent the same, and as the knife wears away its adjustment maybe accomplished by loosening the screw p and forcing the strip nearer tothe roll f and then tightening the clamping-cheeks.

The tool shown in Figs. 2 and 3 is employed for grooving or channeling,and the ends of the two steel strips or blades 0. a are so disposed toeach other as to form an angle. The

lower end of the holder or bracket is is pro- Vided with a forkedextension forming the clamp-cheeks for the blades, and a wedge s isemployed to press the lower ends of the blades between the clamp-cheeksto bring the lower end of the steel blades to the desired angularposition, the Wedge-shaped block 8 fand n to accommodate sheets ofvarying being held in position by a screw 15 passing through a threadedorifice on a lug 1 projecting from the bracket 70.

In the structure shown in Figs. 4, 5, and 0 the two cutting-blades darearranged parallel to each other throughout their entire length andclamped between two cheeks 0 byascrew p, the two blades being separatedby a plate 0', of a thickness corresponding to the width of the grooveto be produced. As the material between the cuts produced by theseblades must be removed to form a channel orgroove, another device forthis purpose must be provided, which may consist of a knife ct, arrangedin the rear of the blades (1 and held in an extension of the holder orbracket 70. This knife a may be wedgeshaped, as shown in Fig. at, or inthe form of a thin blade, as illustrated in Fig. 6.

Having thus described my invention, what In testimony whereof I havehereunto set 35 my hand in presence of two witnesses.

LUDWIG NIOOLAI. Witnesses:

BEN. SCHMIDT, HERNANDO DE SoTo.

